Process of manufacture of a plastic non-inflammable and odorless material.



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1,2fi3',284. Specification of Letters Patent;

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UNITED STATES. PATENT ornrcn.

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nocnss or macaroni: on A To all whom it my concern:

Be it known that I, ROGER Prosnir, engiuser, of 87 Rue dAmsterdam at Paris, Department ofthe Seine, France, citizen of the French Republic, have invented certain new and useful Improvements in Processes .of Manufacture of a Plastic Non-Inflammable and Odorless Material; andI do hereby declare the following to be a full, clear, and exact description of the invention, such as The present invention relates to a plastic noninflamniable and odorless material capable of imitating according to its color, tortoise shell, horn, amber, ivory, or other. analogous substances.

This plastic material is obtained by transforming elatins, lues and the like of ani-- mal origin, by suitable chemical reagents, giving them plastic and malleable properties which allow them'to be worked and used industrially in a similar manner to the natural products.-

The gelatins or glues of animal origin are 'first .melted in a water bath at a tempera-- ture of'about 90 C. 'A decoction of hop flowers is then prepared which is mixed with dilute'oxalic acid or any other acid of the di-carboxylic series of the general formula C E 4 and this solution is added to the melted gelatins or glues in varying propor-' tions according to the quality' of the mate- The oxalic acld is for the purpose of rendering the material in the bath plastic and I this acid is chosen because of the fact that it is mild in its action and will not cause the cracking of the material, such as will be caused by a stronger acid.

. The addition of this solution has the eifect of rendering the gelatins more supple and of causing t e impurities which they contain to be deposited at the bottom of the vessel. When the gelatins are liquefied,

they are poured out in the form of sheets or sticks of the .desired thickness, which are then put to dry in coldair, The coloring of the materials is then proceeded with, employing natural or artificial colors, anilin position: will enable others skilled in theart to which it appertains to make and use the same:' J

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PLASTIC NON-INFLAMMABLE AND ODOR-LESS 'Patented Apr. 1c, 1918.

- Application filed February 9, 1917. Serial No. 147,662.

dyes or solutions prepared previously. These colors will be mixed with the materials in .more or less large quantity according as it Several difi'erent colors may likewise be em- 7 ployed. The sheets thus colored, .are

a bath of approximately the 0 owing com:

About 25% to 35% of formaldehyde. A 25% to 35% ofwater.

25 to 35% of alcohol.

Andthe rest composed of a mixture of oxalic acid, tannin and glycerin;

Ipllunged As above, the oxalic'acidin this bath' may be replaced .by any other acid of the ,dicarboxyllc series of the general formula, C H, The time of immersion of the plates in this bath depends upon their thickness the liquid having to penetrate into the entire plastic mass by imbibition'.

The composition of the bath given above is suitable for gelatins of nominal quality, in the case of rich gelatins, or gelatins of greater viscosity, the proportion of alcohol must be augmented.

The sheets when taken out of the bath. are dried, preferably in hot air.

worked in a similar manner to horn and tortoise shell and which has the same industrial d 1 After vialrycomplete rying a very-p astic very ma e: able material is obtained wliich vcan be applications asthese natural products. This 8; substance when suitably worked may serve for the manufacture of combs, buttons,

brushes, fancy turnery, etc., as an imitation of tortoise shell, horn, amber and ivory. Contrary to the products resulting from the treatment of the cellulose employed now in commerce, as artificial products, the plastic material according to this invention is abso-' lutely noninflammable and odorless,

I claim: Process of'manufacture of a inflammable and odorless material, consisting in treatin melted gelatins witha solui" an tion compose of a, decoction of hops dilute oxalic acid or any other acid of the lastic non-.

dicerboxyiic series of the general formula U H U in ihen plunging the gelatine after having dried and colored them into a bath containing formaldehyde, Water, qlgohoi, oxalic acid or any other acid of the di-cerboxyiic series (C H Q fiannin and glycerin substantially as described.

i eee eee In testimony whereof i e my signature, in presence of two Witnesses.

RUGER PJIUGEY.

Witnesses: K

HENRY Comer, CHAS. 1P. Pmssm'. 

